Organic light-emitting display device

ABSTRACT

Embodiments may disclose an organic light-emitting display device including a first substrate including a pixel area emitting light in a first direction, and a transmittance area that is adjacent to the pixel area and transmits external light; a second substrate facing the first substrate and encapsulating a pixel on the first substrate; an optical pattern array on the first substrate or the second substrate to correspond to the transmittance area, the optical pattern array being configured to transmit or block external light depending on the transmittance area according to a coded pattern; and a sensor array corresponding to the optical pattern array, the sensor array being arranged in a second direction that is opposite to the first direction in which the light is emitted, the second array receiving the external light passing through the optical pattern array.

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This is a divisional application based on pending application Ser. No.14/511,249, filed Oct. 10, 2014, which in turn is a division of Ser. No.13/137,977, filed Sep. 22, 2011, now U.S. Pat. No. 8,860,027 B2 issuedOct. 14, 2014, the entire contents of which is hereby incorporated byreference.

This application claims the benefit of Korean Patent Application No.10-2011-0037348, filed on Apr. 21, 2011, in the Korean IntellectualProperty Office, the disclosure of which is incorporated herein in itsentirety by reference.

BACKGROUND

1. Field of the Invention

Embodiments relate to an organic light-emitting display device. Moreparticularly, embodiments relate to an organic light-emitting displaydevice as interactive media.

2. Description of the Related Art

Interactive media is media in which a user and a mechanical deviceinteract with each other. In interactive media, the user and themechanical device interact with each other according to specific roles.For example, the display device in a display mode may provide an imageto a user, and when the user makes a gesture in capture mode, thedisplay device captures and recognizes the gesture. Then, the displaydevice realizes a function corresponding to the gesture.

SUMMARY

Embodiments may be directed to an organic light-emitting display deviceincluding a first substrate including a pixel area emitting light in afirst direction, and a transmittance area that is adjacent to the pixelarea and transmits external light; a second substrate facing the firstsubstrate and encapsulating a pixel defined on the first substrate; anoptical pattern array formed on the first substrate or the secondsubstrate to correspond to the transmittance area, the optical patternarray being configured to transmit or block external light depending onthe transmittance area according to a coded pattern; and a sensor arraycorresponding to the optical pattern array, the sensory array beingarranged in a second direction that is opposite to the first directionin which the light is emitted, the sensory array receiving the externallight passing through the optical pattern array.

The organic light-emitting display device may further include a pixelcircuit unit on the first substrate, including one or more thin filmtransistors (TFTs), and positioned in the pixel area; a first insulatinglayer covering at least the pixel circuit unit; a first electrode formedon the first insulating layer so as to be electrically connected to thepixel circuit unit, the first electrode being positioned in the pixelarea and being adjacent to the pixel circuit unit so as not to overlapwith the pixel circuit unit and including a transparent conductivematerial; a second insulating layer covering at least a portion of thefirst electrode; a second electrode capable of reflecting light so as toemit light toward the first electrode, the second electrode facing thefirst electrode and being positioned in the pixel area; and an organiclayer interposed between the first electrode and the second electrodeand including an emission layer (EML).

The second insulating layer may include an opening at a positioncorresponding to the transmittance area.

The second electrode may include at least one metal of Ag, Mg, Al, Pt,Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, Yb, and alloys thereof.

The pixel may include a plurality of sub-pixels, and transmittance areasof two adjacent sub-pixels may be connected to each other.

The optical pattern array may include a transmittance pattern by whichthe external light is transmitted; and a light-blocking pattern blockingthe external light, wherein the light-blocking pattern is implementedwhen a light-blocking layer is on the second substrate corresponding tothe transmittance area.

The sensor array may be formed on side portions of the second substrateand may receive the external light passing through the transmittancepattern of the optical pattern array.

The light-blocking layer may include at least one metal of Ag, Mg, Al,Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, Mo, and alloys thereof or mayinclude a black matrix material.

The optical pattern array may include a transmittance pattern by whichthe external light is transmitted; and a light-blocking pattern blockingthe external light, wherein the light-blocking pattern is implementedwhen the second electrode capable of reflecting light is also formed inthe transmittance area.

The organic light-emitting display device may further include a pixelcircuit unit on the first substrate, including one or more TFTs, andpositioned in the pixel area; a first insulating layer covering at leastthe pixel circuit unit; a first electrode on the first insulating layerso as to be electrically connected to the pixel circuit unit, the firstelectrode being positioned in the pixel area and overlapping with thepixel circuit unit so as to cover the pixel circuit unit, the firstelectrode including a reflective layer that is capable of reflectinglight and including a conductive material; a second insulating layercovering at least a portion of the first electrode; a second electrodecapable of transmitting light so as to emit light in an oppositedirection in which the first electrode reflects light, the secondelectrode facing the first electrode; and an organic layer interposedbetween the first electrode and the second electrode and including anEML.

The second insulating layer may include an opening at a positioncorresponding to the transmittance area. The reflective layer mayinclude at least one metal of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr,Li, Ca, Mo, and alloys thereof.

The pixel may include the transmittance area, and a plurality of thepixel areas that are separate from each other by having thetransmittance area there between.

The optical pattern array may include a transmittance pattern by whichthe external light is transmitted; and a light-blocking pattern blockingthe external light, wherein the light-blocking pattern is implementedwhen a light-blocking layer capable of blocking light is on aninsulating layer formed in the transmittance area.

The sensor array may be on side portions of the first substrate andreceives the external light passing through the transmittance pattern ofthe optical pattern array.

The light-blocking layer may include at least one metal of Ag, Mg, Al,Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, Mo, and alloys thereof or mayinclude a black matrix material.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features will become more apparent by describing indetail exemplary embodiments thereof with reference to the attacheddrawings in, which:

FIG. 1 is a cross-sectional view illustrating a portion of an organiclight-emitting display device according to an embodiment;

FIG. 2 is a perspective view illustrating the organic light-emittingdisplay device of FIG. 1;

FIG. 3A through 3D illustrates various optical pattern units included inan optical pattern array;

FIGS. 4A and 4B are diagrams illustrating configurations of a pixel ofthe organic light-emitting display device, according to an embodiment;

FIGS. 5 through 7 are cross-sectional views of the organiclight-emitting display device of FIG. 4A, taken along a line I-I′;

FIG. 8 is a plane view of a light-blocking pattern of FIG. 7;

FIGS. 9A and 9B are diagrams illustrating configurations of a pixel ofan organic light-emitting display device, according to anotherembodiment;

FIGS. 10 and 11 are cross-sectional views of the organic light-emittingdisplay device of FIG. 9A, taken along a line II-II′; and

FIG. 12 illustrates a plane view of the organic light-emitting displaydevice of FIG. 11.

DETAILED DESCRIPTION

Example embodiments will now be described more fully hereinafter withreference to the accompanying drawings; however, they may be embodied indifferent forms and should not be construed as limited to theembodiments set forth herein.

While such terms as “first,” “second,” etc., may be used to describevarious components, such components must not be limited to the aboveterms. The above terms are used only to distinguish one component fromanother.

The terms used in the present specification are merely used to describeparticular embodiments, and are not intended to limit presentembodiments. An expression used in the singular encompasses theexpression in the plural, unless it has a clearly different meaning inthe context. In the present specification, it is to be understood thatthe terms such as “including” or “having,” etc., are intended toindicate the existence of the features, numbers, steps, actions,components, parts, or combinations thereof disclosed in thespecification, and are not intended to preclude the possibility that oneor more other features, numbers, steps, actions, components, parts, orcombinations thereof may exist or may be added.

FIG. 1 is a cross-sectional view illustrating a portion of an organiclight-emitting display device according to an embodiment.

Referring to FIG. 1, the organic light-emitting display device includesa panel 10 that includes a first substrate 1 having a pixel area PA forrealizing an image in a first direction and a transmittance area TA viawhich external light is transmitted, and a second substrate 2encapsulating the first substrate 1.

In the organic light-emitting display device, the external light passesthrough the first substrate 1 and the second substrate 2 and then isreceived by a sensor array 4 positioned in an opposite side of the firstdirection in which the image is realized.

A user may view the image realized on the organic light-emitting displaydevice in the first direction, and when the user makes a gesture 5, thesensor array 4 may capture the gesture 5 of the user, which is projectedafter passing through the panel 10.

The panel 10 includes a coded optical pattern array 3. The opticalpattern array 3 may be formed on the first substrate 1 or the secondsubstrate 2. In FIG. 1, for convenience, the optical pattern array 3 isillustrated between the first substrate 1 and the second substrate 2.The optical pattern array 3 forms a coded pattern by allowing apredetermined transmittance area TA to be blocked or not to be blocked.

The sensor array 4 may capture the gesture 5 of the user via the opticalpattern array 3 having the coded pattern, and may extractthree-dimensional (3D) information by analyzing captured images usingsoftware.

FIG. 2 is a perspective view illustrating the organic light-emittingdisplay device of FIG. 1. In FIG. 2, in order to particularly describean optical pattern unit PU, the optical pattern unit PU is illustratedon a top surface of the panel 10 so as to be clearly shown.

Referring to FIG. 2, the panel 10 of the organic light-emitting displaydevice is partitioned into a plurality of pixels PX, and the opticalpattern array 3 is formed to have an optical pattern unit PU having aspecific pattern with respect to a group of pixels PX. Hence, theoptical pattern unit PU having the specific pattern is repeatedly andcontinuously formed in the panel 10, and thus forms the optical patternarray 3.

An optical pattern is divided into a transmittance pattern OP via whichexternal light is transmitted and a light-blocking pattern CP forblocking the external light. The present embodiment is characterized inthat the transmittance pattern OP and the light-blocking pattern CP arerealized by directly disposing light-blocking films 31 and 33 on theorganic light-emitting display device. Thus, it is not necessary todisplay a separate optical mask pattern and to have a backlight, so thatthe organic light-emitting display device may be large and slim. Amethod of realizing the transmittance pattern OP and the light-blockingpattern CP will be described in detail at a later time.

The sensor array 4 is formed of sensors 41 each corresponding to a pixelPX and an optical pattern. Here, each sensor 41 may be an imaging devicecapable of capturing an image by receiving light. For example, eachsensor 41 may be a charge-coupled device (CCD) sensor or a complementarymetal-oxide-semiconductor (CMOS) sensor.

The sensor array 4 receives incident light by using the optical patternarray 3 as an optical mask. For example, the sensor 41 corresponding tothe transmittance pattern OP may capture an image by receiving light,but the sensors 41 corresponding to the light-blocking pattern CP do notreceive incident light, so that the sensors 41 corresponding to thelight-blocking pattern CP may not capture an image or may obtain only ablack image.

The sensor array 4 may capture images according to optical patterns,respectively. A signal processing unit (not shown) may obtain a 3D imageby processing the images obtained from the sensor array 4.

FIG. 3 illustrates various optical pattern units PU included in theoptical pattern array 3.

Referring to FIG. 3, a case (a) indicates an optical pattern unit PUwith respect to a group of 11×11 pixels PX in total. A case (b)indicates an optical pattern unit PU with respect to a group of 13×13pixels PX in total, and a case (c) indicates an optical pattern unit PUwith respect to a group of 17×17 pixels PX in total. A case (d)indicates an optical pattern unit PU with respect to a group of 19×19pixels PX in total.

In FIG. 3, a black portion indicates a light-blocking pattern CP thatblocks light entering the sensor array 4, and a white portion indicatesa transmittance pattern OP that does not block light entering the sensorarray 4.

According to the present embodiment, as described in FIG. 2, the opticalpattern units PU of FIG. 3 are repeatedly formed in the panel 10,thereby forming the optical pattern array 3. Various optical patternshapes are coded to allow the signal processing unit (not shown) toeasily obtain 3D information, and shapes and functions of the codedoptical patterns are well known according to the related art.

Hereinafter, how the transmittance pattern OP and the light-blockingpattern CP of the optical pattern array 3 are realized in the organiclight-emitting display device will be described in detail.

FIG. 4A is a diagram illustrating a configuration of a pixel PX of theorganic light-emitting display device, according to an embodiment. FIG.4B is a diagram illustrating a configuration of a pixel PX of an organiclight-emitting display device, according to another embodiment.

Referring to FIGS. 4A and 4B, the pixel PX formed on the first substrate1 includes a transmittance area TA via which external light istransmitted, and a pixel area PA that is adjacent to the transmittancearea TA. In more detail, the pixel PX may include a plurality ofsub-pixels Pr, Pg, and Pb. Each of the sub-pixels Pr, Pg, and Pbincludes the pixel area PA and the transmittance area TA, and the pixelareas PA of the sub-pixels Pr, Pg, and Pb included in the pixel PX emitdifferent types of light. For example, the pixel area PA of the firstsub-pixel Pr emits red light R, the pixel area PA of the secondsub-pixel Pg emits green light G, and the pixel area PA of the thirdsub-pixel Pb emits blue light B.

As illustrated in FIG. 4A, according to the present embodiment, thetransmittance area TA may be independently formed for each of thesub-pixels Pr, Pg, and Pb. However, according to another embodiment, asillustrated in FIG. 4B, the transmittance area TA may be commonly formedwhile extending over the sub-pixels Pr, Pg, and Pb. That is, the pixelPX may include the transmittance area TA, and the pixel areas PA thatare separate from each other by having the transmittance area TAtherebetween.

The pixel area PA includes a pixel circuit unit PC including one or morethin film transistors (TFTs) TR1 and TR2, and a plurality of conductivelines including a scan line S, a data line D, and a VDD line V areelectrically connected to the pixel circuit unit PC. Although notillustrated in FIGS. 4A and 4B, according to a configuration of thepixel circuit unit PC, in addition to the scan line S, the data line D,and the VDD line V that delivers a driving power, various conductivelines may be further arranged.

The pixel circuit unit PC includes the first TFT TR1 connected to thescan line S and the data line D, the second TFT TR2 connected to thefirst TFT TR1 and the VDD line V, and a capacitor Cst connected to thefirst TFT TR1 and the second TFT TR2. Here, the first TFT TR1 becomes aswitching transistor, and the second TFT TR2 becomes a drivingtransistor. The second TFT TR2 is electrically connected to a firstelectrode 221. The first TFT TR1 and the second TFT TR2 may be formed asa P-type or an N-type. The number of TFTs and capacitors is not limitedto the aforementioned number according to the present embodiment, andaccording to other configurations of the pixel circuit unit PC, two ormore TFTs and one or more capacitors may be combined.

The pixel area PA includes a light-emission unit EA emitting light, andthe light-emission unit EA is electrically connected to the pixelcircuit unit PC. Referring to FIGS. 4A and 4B, the light-emission unitEA does not overlap with the pixel circuit unit PC but is adjacent toit.

According to the present embodiment, in order to implement interactivemedia, the optical pattern array 3 is formed to correspond to thetransmittance area TA. Hereinafter, a case in which a transmittancepattern OP is formed to correspond to a transmittance area TA will bedescribed in detail with reference to FIG. 5. A case in which alight-blocking pattern CP is formed to correspond to a transmittancearea TA will be described in detail with reference to FIGS. 6 through 8.

FIGS. 5 through 7 are cross-sectional views of the organiclight-emitting display device of FIG. 4A, taken along a line I-I′. FIGS.5 through 7 also illustrate configurations of a second substrate 2 and asensor array 4 that are not illustrated in FIGS. 4A and 4B.

FIG. 5 illustrates a case in which the transmittance pattern OP isformed to correspond to the transmittance area TA, according to anembodiment.

Referring to FIG. 5, the second TFT TR2 is formed on a first substrate 1and has a structure in which a buffer layer 211 is formed to preventpenetration of moisture, and an active layer 212, a gate insulatinglayer 213, a gate electrode 214, an interlayer insulating layer 215, andsource and drain electrodes 216 and 218 are sequentially formed on thebuffer layer 211. The second TFT TR2 is included in the pixel circuitunit PC. Next, a passivation layer 217 that is an insulating layer isformed to completely cover the pixel circuit unit PC and thetransmittance area TA.

A first electrode 221 that is transparent and that is electricallyconnected to the second TFT TR2 of the pixel circuit unit PC is formedon the passivation layer 217. In particular, the first electrode 221 isincluded in the light-emission unit EA. Here, the first electrode 221includes a transparent conductive material. For example, the firstelectrode 221 may be formed as ITO, IZO, ZnO, or In₂O₃, which has a highwork function. In this case, the first electrode 221 functions as ananode.

Reference numeral 219 of FIG. 5 is a pixel defining layer (PDL) 219 thatcovers side portions of the first electrode 221 and exposes a centerportion of the first electrode 221. The PDL 219 may cover the pixel areaPA. In this regard, it is not necessary for the PDL 219 to completelycover the pixel area PA. Thus, it is sufficient for the PDL 219 to coverat least a portion of the pixel area PA, i.e., side portions of thepixel area PA.

A second electrode 222 faces the first electrode 221 and is formed inthe light-emission unit EA. The second electrode 222 is formed of amaterial capable of reflecting light so as to emit the light toward thefirst electrode 221. For example, the second electrode 222 may includeat least one metal of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca,Yb, and alloys thereof. In this case, the second electrode 222 functionsas a cathode.

The second electrode 222 may extend over the entire pixel area PA so asto cover both the light-emission unit EA and the pixel circuit unit PC.However, the second electrode 222 is not formed in the transmittancearea TA. By doing so, external light may be transmitted to the sensorarray 4 from the transmittance area TA. Due to the aforementionedconfigurations of the first electrode 221 and the second electrode 222,in the organic light-emitting display device of FIG. 5, light is emittedto the first electrode 221 that is toward a bottom side.

An organic layer 223 is interposed between the first electrode 221 andthe second electrode 222, and includes an emission layer (EML). Theorganic layer 223 may be formed as a small-molecule organic layer or apolymer organic layer. When the organic layer 223 is formed as thesmall-molecule organic layer, the organic layer 223 may have a structurein which a Hole Injection Layer (FHL), a Hole Transport Layer (HTL), anEML, an Electron Transport Layer (ETL), an Electron Injection Layer(EIL) or the like are singularly or multiply stacked, and may be formedby using one of various organic materials including copperphthalocyanine (CuPc), N,N′-Di(naphthalene-1-yl)-N,N′-diphenyl-benzidine(NPB), tris-8-hydroxyquinoline aluminum)(Alq3), etc. The small-moleculeorganic layer may be formed by using a vacuum deposition method.

The second substrate 2 is formed above the first substrate 1 so as toencapsulate the pixel area PA and the transmittance area TA. Here, thesecond substrate 2 may be formed of a transparent material, and may havea substrate shape or a sheet shape.

The sensor array 4 is disposed near to the second substrate 2. That is,the sensor array 4 is disposed at a top side that is away from theoccurrence of light emission.

Referring to the pixel PX of FIG. 5, in order to allow the sensor array4 corresponding to the transmittance area TA of the pixel PX to receiveexternal light, a structure that blocks transmission of the externallight is not formed in the transmittance area TA. In other words, theoptical pattern array 3 corresponding to the pixel PX of FIG. 5corresponds to the transmittance pattern OP.

On the other hand, FIG. 6 illustrates a case in which the light-blockingpattern CP is formed to correspond to the transmittance area TA,according to another embodiment.

Unlike the case of FIG. 5, FIG. 6 is characterized such that alight-blocking layer 31 is formed on one surface of a second substrate2. In the case of FIG. 6, the light-blocking layer 31 is formed on thesurface of the second substrate 2 facing a first substrate 1. However,according to one or more embodiments, the light-blocking layer 31 may beformed on the other surface of the second substrate 2, which is awayfrom the first substrate 1. While it is sufficient for thelight-blocking layer 31 to cover only the transmittance area TA, it isalso possible for the light-blocking layer 31 to be formed in both ofthe pixel area PA and the transmittance area TA so as to completelycover the pixel PX.

The light-blocking layer 31 may be formed of a material capable ofreflecting or blocking light, and for example, the light-blocking layer31 may include at least one metal of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir,Cr, Li, Ca, Mo, and alloys thereof or may include a black matrixmaterial.

According to the present embodiment, the optical pattern array 3corresponding to the pixel PX of FIG. 6 includes the light-blockinglayer 31 so that external light is not transmitted via the transmittancearea TA. Thus, the optical pattern array 3 is the light-blocking patternCP that cannot deliver light to the sensor array 4 corresponding to thepixel PX.

FIG. 7 is a cross-sectional view illustrating another example of thelight-blocking pattern CP of FIGS. 4A and 4B which is different fromthat of FIG. 6, according to another embodiment. FIG. 8 is a plane viewof the light-blocking pattern CP of FIG. 7.

Unlike the embodiment of FIG. 6, the present embodiment of FIG. 7 ischaracterized in that the light-blocking layer 31 is not formed on asecond substrate 2, but instead, a second electrode 222 capable ofreflecting light extends over a transmittance area TA. In other words,as illustrated in FIG. 8, the second electrode 222 is formed tocompletely cover a pixel area PA and the transmittance area TA.

According to the present embodiment, the optical pattern array 3 thatcorresponds to the pixel PX of FIGS. 7 and 8 cannot transmit externallight to the sensor array 4. Thus, similar to the embodiment of FIG. 6,the optical pattern array 3 of FIG. 7 is the light-blocking pattern CPthat cannot deliver light to the sensor array 4 corresponding to thepixel PX.

FIG. 9A is a diagram illustrating a configuration of a pixel PX of anorganic light-emitting display device, according to another embodiment.FIG. 9B is a diagram illustrating a configuration of a pixel PX of anorganic light-emitting display device, according to another embodiment.

Referring to FIG. 9A, the pixel PX formed on a first substrate 1includes a transmittance area TA that transmits external light, and apixel area PA that is adjacent to the transmittance area TA. Here,similar to the pixel area PA, the transmittance area TA may beindependently formed for each of a plurality of sub-pixels Pr, Pg, andPb. However, referring to the other embodiment of FIG. 9B, thetransmittance area TA may be commonly formed while extending over thesub-pixels Pr, Pg, and Pb. The pixel areas PA of the sub-pixels Pr, Pg,and Pb included in the pixel PX emit different types of light. Forexample, the pixel area PA of the first sub-pixel Pr emits red light R,the pixel area PA of the second sub-pixel Pg emits green light G, andthe pixel area PA of the third sub-pixel Pb emits blue light B.

The pixel area PA includes a pixel circuit unit PC including one or moreTFTs TR1 and TR2, and a plurality of conductive lines including a scanline S, a data line D, and a VDD line V are electrically connected tothe pixel circuit unit PC. Although not illustrated in FIGS. 9A and 9B,according to a configuration of the pixel circuit unit PC, in additionto the scan line S, the data line D, and the VDD line V that delivers adriving power, various conductive lines may be further arranged.

The pixel circuit unit PC includes the first TFT TR1 connected to thescan line S and the data line D, the second TFT TR2 connected to thefirst TFT TR1 and the VDD line V, and a capacitor Cst connected to thefirst TFT TR1 and the second TFT TR2. Here, the first TFT TR1 becomes aswitching transistor, and the second TFT TR2 becomes a drivingtransistor. The second TFT TR2 is electrically connected to a firstelectrode 221. The first TFT TR1 and the second TFT TR2 may be formed asa P-type or an N-type. The number of TFTs and capacitors is not limitedto the aforementioned number according to the present embodiment, andaccording to other configurations of the pixel circuit unit PC, two ormore TFTs and one or more capacitors may be combined.

The pixel area PA includes a light-emission unit EA emitting light, andthe light-emission unit EA is electrically connected to the pixelcircuit unit PC. Unlike the embodiments of FIGS. 4A and 4B, referring tothe embodiments of FIGS. 9A and 9B, the light-emission unit EA overlapswith the pixel circuit unit PC so as to cover the pixel circuit unit PC.

According to the present embodiment, in order to implement interactivemedia, an optical pattern array 3 is formed to correspond to thetransmittance area TA. Hereinafter, a case in which a transmittancepattern OP is formed to correspond to a transmittance area TA will bedescribed in detail with reference to FIG. 10, and a case in which alight-blocking pattern CP is formed to correspond to a transmittancearea TA will be described in detail with reference to FIGS. 11 and 12.

FIGS. 10 and 11 are cross-sectional views of the organic light-emittingdisplay device of FIG. 9A, taken along a line FIGS. 10 and 11 alsoillustrate configurations of a second substrate 2 and a sensor array 4that are not illustrated in FIGS. 9A and 9B.

First, FIG. 10 illustrates a case in which the transmittance pattern OPis formed to correspond to the transmittance area TA.

Referring to FIG. 10, the first and second TFTs TR1 and TR2 are formedon a first substrate 1 and have structures in which a buffer layer 211is formed to prevent penetration of moisture, and an active layer 212, agate insulating layer 213, a gate electrode 214, an interlayerinsulating layer 215, and source and drain electrodes 216 and 218 aresequentially formed on the buffer layer 211. Also, FIG. 10 furtherillustrates the capacitor Cst formed on the gate insulating layer 213.Here, the capacitor Cst includes a lower electrode 220, an upperelectrode 230, and an interlayer insulating 215 interposed between thelower electrode 220 and the upper electrode 230. The first and secondTFTs TR1 and TR2, and the capacitor Cst are included in the pixelcircuit unit PC. Next, a passivation layer 217 that is an insulatinglayer is formed to completely cover the pixel circuit unit PC and thetransmittance area TA.

A first electrode 221 that is electrically connected to the second TFTTR2 of the pixel circuit unit PC and that includes a reflective layercapable of reflecting light is formed on the passivation layer 217.Here, the first electrode 221 has a multi-layer structure of atransparent conductive layer and the reflective layer. Here, thetransparent conductive layer may be formed of ITO, IZO, ZnO, or In₂O₃,which has a high work function. Here, the reflective layer may includeat least one metal of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca,Mo, and alloys thereof. The first electrode 221 may be formed only inthe light-emission unit EA. In this case, the first electrode 221functions as an anode.

Reference numeral 219 of FIG. 10 is a PDL 219 that covers side portionsof the first electrode 221 and exposes a center portion of the firstelectrode 221. The PDL 219 may cover the pixel area PA and in thisregard, it is not necessary for the PDL 219 to completely cover thepixel area PA. Thus, it is sufficient for the PDL 219 to cover at leasta portion of the pixel area PA, i.e., side portions of the pixel areaPA.

A second electrode 222 faces the first electrode 221 and is formed inthe light-emission unit EA. The second electrode 222 is formed to belight-transmitting so as to emit light in a direction of the secondelectrode 222. For example, the second electrode 222 may be formed ofmetal having a small work function, e.g., Ag, Mg, Al, Pt, Pd, Au, Ni,Nd, Ir, Cr, Li, Ca, Yb, or alloys thereof. Here, the second electrode222 may be formed as a thin film having a thickness in the range of 100to 300 Å so as to have high transmittance. In this manner, the secondelectrode 222 is formed as a semi-transmissive and semi-reflective layerto be light-transmitting, so that the organic light-emitting displaydevice is formed as a top-emission organic light-emitting displaydevice. In this case, the second electrode 222 functions as a cathode.

The second electrode 222 may be formed not only in the pixel area PA butalso in the transmittance area TA. According to the present embodiment,the second electrode 222 is formed as the thin film, so that, althoughthe second electrode 222 is formed in the transmittance area TA,external light may pass through the second electrode 222. Due to theaforementioned configurations of the first electrode 221 and the secondelectrode 222, in the organic light-emitting display device of FIG. 10,light is emitted to the second electrode 222 that is toward a top side.

An organic layer 223 is interposed between the first electrode 221 andthe second electrode 222, and includes an EML. The organic layer 223 maybe formed as a small-molecule organic layer or a polymer organic layer.

The second substrate 2 is formed to encapsulate the pixel area PA andthe transmittance area TA formed on the first substrate 1. Here, thesecond substrate 2 may be formed of a transparent material, and may havea substrate shape or a sheet shape.

The sensor array 4 is disposed near to the first substrate 1. That is,the sensor array 4 is disposed at a bottom side that is away from theoccurrence of light emission.

Referring to the pixel PX of FIG. 10, in order to allow the sensor array4 corresponding to the transmittance area TA of the pixel PX to receiveexternal light, a structure that blocks transmission of the externallight is not formed in the transmittance area TA. In other words, theoptical pattern array 3 corresponding to the pixel PX of FIG. 5corresponds to the transmittance pattern OP.

On the other hand, FIG. 11 illustrates a case in which thelight-blocking pattern CP is formed to correspond to the transmittancearea TA, according to another embodiment. FIG. 12 illustrates a planeview of the organic light-emitting display device of FIG. 11.

Unlike the case of FIG. 10, FIG. 11 is characterized such thatlight-blocking layers 33 and 35 are formed on an insulating layer formedin the transmittance area TA. However, according to one or moreembodiments, the light-blocking layers 33 and 35 may be formed on onesurface of the first substrate 1 which corresponds to the transmittancearea TA, or may be formed on the other surface of the first substrate 1.While it is sufficient for the light-blocking layers 33 and 35 to coveronly the transmittance area TA, it is also possible for thelight-blocking layers 33 and 35 to be formed in both the pixel area PAand the transmittance area TA so as to completely cover the pixel PX.

In the organic light-emitting display device of FIG. 11, the firstlight-blocking layer 33 is formed on the passivation layer 217corresponding to the transmittance area TA, and the secondlight-blocking layer 35 is formed on the gate insulating layer 213corresponding to an area between the transmittance area TA and the pixelarea PA. In other words, referring to FIG. 11, the light-blocking layer33 formed on the same layer as the first electrode 221 cannot completelyblock external light escaping through a space between the firstelectrode 221 and the first light-blocking layer 33, and external lightescaping through a space between the first light-blocking layer 33 andthe first electrode 221 of an adjacent pixel. Thus, the secondlight-blocking layer 35 is used. Referring to FIG. 12, external lightcannot pass through the transmittance area TA due to the first andsecond light-blocking layers 33 and 35.

The light-blocking layers 33 and 35 may be formed of a material capableof reflecting or blocking light, and for example, the light-blockinglayer 31 may include at least one metal of Ag, Mg, Al, Pt, Pd, Au, Ni,Nd, Ir, Cr, Li, Ca, Mo, and alloys thereof or may include a black matrixmaterial.

According to the present embodiment, the optical pattern array 3corresponding to the pixel PX of FIGS. 11 and 12 includes thelight-blocking layers 33 and 35 so that transmittance of external lightis partially impossible in the transmittance area TA. Thus, the opticalpattern array 3 of FIGS. 11 and 12 is the light-blocking pattern CP thatcannot deliver light to the sensor array 4 corresponding to the pixelPX.

In the present embodiment, the insulating layer may be formed of atransparent material so as to increase transmittance of thetransmittance area TA. Here, the insulating layer may indicate thepassivation layer 217. However, the one or more embodiments are notlimited thereto. Thus, all of the interlayer insulating layer 215, thegate insulating layer 213, and the buffer layer 211 may be formed of atransparent material, whereby transmittance of the organiclight-emitting display device may be further increased.

In addition, in order to further increase the transmittance of thetransmittance area TA and to prevent optical interference due totransparent insulating layers in the transmittance area TA, and colorpurity deterioration and color change due to the optical interference,an opening may be formed in some of the insulating layers correspondingto the transmittance area TA.

For example, the opening may be formed in the PDL 219 covering the pixelcircuit unit PC. However, the one or more embodiments are not limitedthereto. Thus, openings connected to the opening of the PDL 219 may befurther formed in one or more of the passivation layer 217, theinterlayer insulating layer 215, the gate insulating layer 213, and thebuffer layer 211, so that transmittance in the opening may be furtherincreased.

By way of summation and review, a display device has to include anoptical mask and a sensor array to capture a gesture. The optical maskhas a coded optical pattern so as to extract three-dimensional (3D) databy analyzing the captured gesture. In order to implement an interactivemedia by using a display device, i.e., a liquid crystal display (LCD)device may need to perform time-division switching between a displaymode (implementation of a display image, and switching a backlight ON),and a capture mode (implementation of an optical mask pattern, andswitching the backlight OFF). Thus, as a result of time-divisionswitching, brightness of the display image deteriorates, and astructural interference occurs between the backlight and the sensorarray.

In contrast, embodiments are directed to an organic light-emittingdisplay device having a coded optical pattern array directly formedthereon. According to one or more embodiments, the coded optical patternarray is directly formed on a transparent panel of the organiclight-emitting display device. Thus, it is not necessary to display aseparate optical mask pattern. In the embodiments, since a backlight isnot used, interactive media may be implemented that is slim, large, andfree from structural interference.

According to one or more embodiments, by implementing the interactivemedia in the organic light-emitting display device having atransmittance area, a display device may display an image andsimultaneously capture a gesture of a user by the transmittance area.Thus, it is not necessary to perform time-division switching between adisplay mode and a capture mode as in the related art.

Exemplary embodiments have been disclosed herein, and although specificterms are employed, they are used and are to be interpreted in a genericand descriptive sense only and not for purpose of limitation.

1.-17. (canceled)
 18. An organic light-emitting display device, comprising: a first substrate including a plurality of pixels, each of the pixels including a pixel area emitting light in a first direction and a transmittance area adjacent to the pixel area and transmitting external light; a second substrate facing the first substrate and encapsulating the pixels on the first substrate; an optical pattern array on the first substrate or the second substrate corresponding to the pixels, the optical pattern array being configured to transmit or block external light to predetermined pixels of the pixels according to a coded pattern; and a sensor array corresponding to the optical pattern array, the sensor array being arranged to receive external light in a second direction that is opposite to the first direction in which the light is emitted, the sensor array receiving the external light passing through the optical pattern array, wherein the optical pattern array includes: a transmittance pattern by which the external light is transmitted; and a light-blocking pattern blocking the external light, wherein the light-blocking pattern is implemented by a second electrode capable of reflecting light in the transmittance area.
 19. The organic light-emitting display device as claimed in claim 18, further comprising: a pixel circuit unit on the first substrate, including one or more thin film transistors (TFTs), and positioned in the pixel area; a first insulating layer covering at least the pixel circuit unit; a first electrode on the first insulating layer so as to be electrically connected to the pixel circuit unit, the first electrode being positioned in the pixel area and being adjacent to the pixel circuit unit so as not to overlap with the pixel circuit unit, and including a transparent conductive material; a second insulating layer covering at least a portion of the first electrode; a second electrode capable of reflecting light so as to reflect light toward the first electrode, the second electrode facing the first electrode and being positioned in the pixel area; and an organic layer interposed between the first electrode and the second electrode and including an emission layer (EML).
 20. The organic light-emitting display device as claimed in claim 19, wherein the second electrode includes at least one metal of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, Mo, and alloys thereof or includes a black matrix material. 